Download e-book for kindle: Developing Custom Delphi Components by Ray Konopka

By Ray Konopka

ISBN-10: 1883577470

ISBN-13: 9781883577476

Contains the Delphi item Pascal item version. Covers VCL part structure, multi-control elements, and part DLLs. Explains part construction and debugging, and box defense and entry rights. Clarifies item Pascal exceptions and exception dealing with. exhibits you ways to exploit some of the top Delphi controls to be had to construct home windows functions. Tells approximately imposing houses, estate editors, and occasions and occasion handlers.

Show description

Read or Download Developing Custom Delphi Components PDF

Similar object-oriented design books

Download e-book for kindle: Java Enterprise in a Nutshell: A Desktop Quick Reference (In by David Flanagan, Visit Amazon's Jim Farley Page, search

Caution to all purchasers, the third version of this ebook doesn't contain the J2EE library reference. whereas I discover this data is accessible on-line, having a published type of library references is the first cause i purchase the "in a nutshell" sequence. integrated during this e-book is a really basic evaluation of assorted company applied sciences, which not like the very worthwhile language reference comprise in different "in a nutshell" books, turns out too large and shallow to be valuable.

Download e-book for iPad: Java generics and collections by Maurice Naftalin

This entire consultant indicates you the way to grasp the main importantchanges to Java because it was once first published. Generics and the greatlyexpanded assortment libraries have enormously elevated the facility ofJava five and Java 6. yet they've got additionally stressed many builders whohaven't identified find out how to benefit from those new beneficial properties.

Download e-book for kindle: Java Web Services: Up and Running: A quick, practical, and by Martin Kalin

This example-driven booklet deals an intensive advent to Java's APIs for XML net companies (JAX-WS) and RESTful net providers (JAX-RS). Java net companies: Up and operating takes a transparent, pragmatic method of those applied sciences through supplying a mixture of architectural evaluation, entire operating code examples, and brief but detailed directions for compiling, deploying, and executing an program.

Resource-Oriented Computing with NetKernel: Taking REST by Tom Geudens PDF

Take resource-oriented computing out for a spin with this hands-on advent to NetKernel, and detect how ROC can increase how you layout and enforce software program and software program structures. find out how ROC's new method combines center rules from the remainder architectural sort with the Unix improvement version.

Additional resources for Developing Custom Delphi Components

Sample text

44 Chapter 2 Although class methods can also be called from an object instance, the implementation of class methods cannot reference any fields or normal methods of the class type. However, constructors and other class methods may be referenced. As a result, class methods usually modify global data, or return information about the class. Class methods combine the benefits of belonging to a class with the accessibility of a normal procedure or function. Even though these methods can be called without creating an object instance, class methods are still bound by the access rights specified in the class declaration.

These methods are called access methods. 1 shows a BP7 program that implements a bookcase object, complete with properties. This simple program demonstrates how traditional languages 49 50 Chapter 3 implement properties and, more importantly, how those properties are used in a program. The goal of this sample program is to create a three-shelf bookcase with a width of thirty inches and a depth of ten inches. After the number of shelves is modified, the total shelf space (in square inches) in calculated.

3 shows the effect this has on the program. 3 Handling the wm_LButtonDown message. 40 Chapter 2 Second, message-handling methods can always be specified for a class—even if the ancestor class defines a private method handling the same message. And finally, Delphi defines several custom message types that automatically extract the appropriate information from the standard Windows message structure. For example, the TWMLButtonDown message type is defined such that the X and Y coordinates of the mouse click, normally embedded into the low and high words of the LParam field of the message record, can be accessed by referencing the XPos and YPos fields, respectively.

Download PDF sample

Developing Custom Delphi Components by Ray Konopka


by Christopher
4.1

Rated 4.50 of 5 – based on 8 votes

Related posts